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  <div class="section" id="cmp0073">
<span id="policy:CMP0073"></span><h1>CMP0073<a class="headerlink" href="#cmp0073" title="Permalink to this headline">¶</a></h1>
<p>Do not produce legacy <code class="docutils literal notranslate"><span class="pre">_LIB_DEPENDS</span></code> cache entries.</p>
<p>Ancient CMake versions once used <code class="docutils literal notranslate"><span class="pre">&lt;tgt&gt;_LIB_DEPENDS</span></code> cache entries to
propagate library link dependencies.  This has long been done by other
means, leaving the <span class="target" id="index-0-command:export_library_dependencies"></span><a class="reference internal" href="../command/export_library_dependencies.html#command:export_library_dependencies" title="export_library_dependencies"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">export_library_dependencies()</span></code></a> command as the
only user of these values.  That command has long been disallowed by
policy <span class="target" id="index-0-policy:CMP0033"></span><a class="reference internal" href="CMP0033.html#policy:CMP0033" title="CMP0033"><code class="xref cmake cmake-policy docutils literal notranslate"><span class="pre">CMP0033</span></code></a>, but the <code class="docutils literal notranslate"><span class="pre">&lt;tgt&gt;_LIB_DEPENDS</span></code> cache entries
were left for compatibility with possible non-standard uses by projects.</p>
<p>CMake 3.12 and above now prefer to not produce these cache entries
at all.  This policy provides compatibility with projects that have
not been updated to avoid using them.</p>
<p>The <code class="docutils literal notranslate"><span class="pre">OLD</span></code> behavior for this policy is to set <code class="docutils literal notranslate"><span class="pre">&lt;tgt&gt;_LIB_DEPENDS</span></code> cache
entries.  The <code class="docutils literal notranslate"><span class="pre">NEW</span></code> behavior for this policy is to not set them.</p>
<p>This policy was introduced in CMake version 3.12.  Use the
<span class="target" id="index-0-command:cmake_policy"></span><a class="reference internal" href="../command/cmake_policy.html#command:cmake_policy" title="cmake_policy"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">cmake_policy()</span></code></a> command to set it to <code class="docutils literal notranslate"><span class="pre">OLD</span></code> or <code class="docutils literal notranslate"><span class="pre">NEW</span></code> explicitly.
Unlike most policies, CMake version 3.16.5 does <em>not</em> warn
when this policy is not set and simply uses <code class="docutils literal notranslate"><span class="pre">OLD</span></code> behavior.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>The <code class="docutils literal notranslate"><span class="pre">OLD</span></code> behavior of a policy is
<span class="target" id="index-0-manual:cmake-policies(7)"></span><a class="reference internal" href="../manual/cmake-policies.7.html#manual:cmake-policies(7)" title="cmake-policies(7)"><code class="xref cmake cmake-manual docutils literal notranslate"><span class="pre">deprecated</span> <span class="pre">by</span> <span class="pre">definition</span></code></a>
and may be removed in a future version of CMake.</p>
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